Compounds of Two-coordinated Phosphorus

Diels−Alder Reaction of Phosphaethene with 1,3-Dienes: An ab Initio Study

“…The Diels−Alder (DA) reaction, perhaps the most widely used synthetic method for the construction of six-membered rings, also has been central in the development of theoretical models of pericyclic reactions . The availability of new classes of organophosphorus compounds with >CP− functionalities, namely, phosphaalkenes, − heterophospholes, ,− anellated azaphospholes, − and phosphinines, has further enlarged the scope of the DA reaction. A number of [4 + 2] cycloadditions have been carried out successfully using these phosphorus compounds, mostly as dienophiles, but in some cases as diene components as well.…”

“…A number of [4 + 2] cycloadditions have been carried out successfully using these phosphorus compounds, mostly as dienophiles, but in some cases as diene components as well. Unlike the phosphaalkenes, which have a strong tendency to undergo [2 + 2] dimerization unless bulky substituents are present, ,, the DA reaction of the parent phosphaethene, generated in situ, with 2,3-dimethyl-1,3-butadiene leads to a tetrahydrophosphinine .…”

Encapsulation of Gold Nanorods with Porphyrins for the Potential Treatment of Cancer and Bacterial Diseases: A Critical Review

“…The method provides crystalline and pure product relative to the Rothermund reaction product, and it can also be used with different aldehydes to produce porphyrins but it poses certain problems; the high temperatures and concentrations hinder the synthesis of porphyrins with sensitive functional groups [144, 160, 161]. The reaction method as established by Alder, Longo, and Shergalis shows that before the porphyrin is cyclised, it goes through a carbinol step as shown in Figure 15 [162].…”

Recent Reviews

“…Phenanthraquinone monimine, rearr, 132 Phenoxazine and rel cmpds, 127 Pheromones, achiral components, synth, 252 sex, insect, 258 Phosphacumulene ylides, 66 Phosphate esters, hydrolysis, 198 Phosphonates as phosphate analogues, 89 Phosphorus cmpds, d-orbitals, 375 two-coordinate, 234 Wittig, 68 Phosphorus heterocycles, polycyclic, 85 Phosphorylation methods, biol molecules, 251 Photochemical decomp, heterocycles, 91 Photochemistry, ab initio calen, 178 aldehyde leuco dye, 187 azirines, 112 benzene 49, 263 bichromophoric systems, 52, 179 C-N bond, 83 cycloelimination N2 in, 81 dinucleotide analogues, 128 heterocycles with CNO, NCO, 182 ¡mines, 98 mechanistic and explor, 189 monolayers, 188 N-ylides, 183 organotransition metal cmpds, 50 polyenes, 184 polymer, 180 proton transfer in, 51 vision cis-trans isomer, 186 visual pigments, 185 Photochromic polymers, 223 Photoinitiation, quinone reaens, 220 Photolysis, ale, ether, amine, 48 Photooxidation, aldehyde leuco dye, 187 Photosensitized oxygenation, tryptophane, 17 Pigments, visual photochem, 185 Plant growth chemicals, 101 Polarization reversal in carbonyl cmpds, 246 Polyalkali metal derivs, heterofunctional cmpds, 248 Polyene, photochem, 184 Polyketide natural prods, synth, 260 Polymerization, alternating, 80 vinyl metal-containing monomers, 340 Polymers, bio, 13C NMR, 276 a-diketone, 219 photochem, 180 photochromic, 223 Polysaccharides, bacterial, structure, 200 degradation, 201 uronic acid contng, 202 Polysulfides, 323 Prins reacn, 250 Prostaglandins, heterocyclic, 362 heterocyclic analogues, 237 Prostaglandin synthesis,…”